2004 Pontiac Montana Q&A
2004 Pontiac Montana Question: Anyone know the source of an intermittant raw gas smell in my Pontiac Montana?
Only smell gas when engine is running or right after shutoff. Pulled vacuum hose thinking it was fuel pressure regulator but couldn't detect gas. Doesn't happen every day. No hard start or drivability problems. No leaks detected on the floor but the gas smell seems stronger at the engine. - Rookie2
May not be a gas leak but a combination of 2 things. Poor combustion due to worn out spark plugs or a bad spark plug coil and an exhaust leak between the catalytic converter and the main exhaust manifolds. Have to check both to see if the flex pipe is bad or the spark plugs are as well. Exhaust has a much stronger gas smell before it goes through the catalytic converter. - csubak30
Check your fuel pressure regulator. It will leak at the seam intermittently. That should cure your problem. - Riddickg